[TowerTalk] Whole House Surge Protectors

[R. Kevin Stover]

Jim McDonald wrote:
> I have an APC Smart-UPS 700 that I bought from RefurbUPS.com.  I can't tell
> in the information I have which type of UPS it is.  Does anyone know?
> Thanks.
> 
> Jim N7US


It's a consumer grade switching UPS with a 500W capacity.

It'll hold half load (250W) for about 14 minutes and full load for about 
4.5.

It's designed for PC's and has either a serial or USB connection which 
will allow software running on the PC to catch a signal from the UPS to 
start a graceful shutdown of the PC when the UPS reaches a user defined 
level of discharge.

It is a switching style of UPS and not a 100% inverting style.
In my experience with them they are susceptible to RF and "dirty" line 
power. If the source varies in frequency or voltage by more than about 7 
- 10% the relay will constantly trip in and out.

The 100% inverting style of UPS is what you want. They are more 
expensive and probably don't come in VA ratings of less than 1,000.


-- 
R. Kevin Stover	ACØH

K2/100 #4684

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